{"product_id":"smsl-h400mk2","title":"SMSL H400 MK2 Fully Balanced Headphone Amplifier \u0026 Pre-amplifier","description":"\u003c!-- SMSL H400 MK2 REFERENCE BALANCED AMPLIFIER MASTER EDITION --\u003e\n\u003cdiv class=\"h400mk2-ultimate-description\" style=\"font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; color: #2c2c2c; line-height: 1.7; max-width: 800px; margin: 0 auto; padding: 20px 0;\"\u003e\u003c!-- Native Premium CSS for Dynamic Plus\/Minus Toggles \u0026 Hover Effects --\u003e\u003c\/div\u003e\n\u003cdiv class=\"h400mk2-ultimate-description\" style=\"font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; color: #2c2c2c; line-height: 1.7; max-width: 800px; margin: 0 auto; padding: 20px 0;\"\u003e\n\u003c!-- 1. Header \u0026 Title Overview Section --\u003e\n\u003cdiv style=\"text-align: center; margin-bottom: 40px;\"\u003e\n\u003cspan style=\"font-size: 11px; font-weight: bold; color: #b89775; letter-spacing: 2px; text-transform: uppercase; display: block; margin-bottom: 10px;\"\u003eUltimate Flagship Series\u003c\/span\u003e\n\u003ch2 style=\"font-size: 26px; font-weight: 500; color: #111; letter-spacing: 0.5px; margin-bottom: 12px; font-family: inherit;\"\u003eSMSL H400 MK2 Fully Balanced Headphone Amplifier \u0026amp; Pre-amplifier\u003c\/h2\u003e\n\u003cp style=\"font-size: 15px; color: #666; max-width: 650px; margin: 0 auto; font-family: inherit;\"\u003eAn uncompromised, reference-grade desktop headphone amplifier and analog balanced pre-amplifier. Engineered with 14x OPA1612A op-amps, patented PLFC+ circuitry, and an ultra-low-noise GaN power supply to deliver ultimate drive power and class-leading measurements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 2. Highlights at a Glance (Responsive Grid with Premium SVG Icons) --\u003e\n\u003ch3 style=\"font-size: 18px; font-weight: 600; color: #111; border-bottom: 1px solid #eee; padding-bottom: 8px; margin-top: 40px; margin-bottom: 25px; text-transform: uppercase; letter-spacing: 0.5px; font-family: inherit;\"\u003eHighlights at a Glance\u003c\/h3\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 20px; justify-content: space-between; margin-bottom: 40px;\"\u003e\n\u003c!-- Card 1 --\u003e\n\u003cdiv style=\"flex: 1 1 calc(50% - 10px); min-width: 280px; box-sizing: border-box; background-color: #fff; padding: 20px; border-radius: 8px; border: 1px solid #eaeaea;\"\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 15px;\"\u003e\n\u003cdiv style=\"width: 36px; height: 36px; flex-shrink: 0; background-color: #111; border-radius: 50%; display: flex; align-items: center; justify-content: center;\"\u003e\u003csvg stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.5\" stroke=\"#b89775\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"18\" width=\"18\"\u003e\u003cpath d=\"M13 2L3 14h9l-1 8 10-12h-9l1-8z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch4 style=\"margin: 0 0 6px 0; font-size: 15px; font-weight: 600; color: #111; font-family: inherit;\"\u003eColossal 18W Balanced Output\u003c\/h4\u003e\n\u003cp style=\"margin: 0; font-size: 12.5px; color: #666; line-height: 1.5; font-family: inherit;\"\u003eUnleashes massive current drive (18W @ 16Ω, 9W @ 32Ω) to easily master power-hungry planar magnetic and dynamic headphones.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Card 2 --\u003e\n\u003cdiv style=\"flex: 1 1 calc(50% - 10px); min-width: 280px; box-sizing: border-box; background-color: #fff; padding: 20px; border-radius: 8px; border: 1px solid #eaeaea;\"\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 15px;\"\u003e\n\u003cdiv style=\"width: 36px; height: 36px; flex-shrink: 0; background-color: #111; border-radius: 50%; display: flex; align-items: center; justify-content: center;\"\u003e\u003csvg stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.5\" stroke=\"#b89775\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"18\" width=\"18\"\u003e\u003ccircle r=\"9\" cy=\"12\" cx=\"12\"\u003e\u003c\/circle\u003e\u003ccircle r=\"3\" cy=\"12\" cx=\"12\"\u003e\u003c\/circle\u003e\u003cline y2=\"9\" x2=\"12\" y1=\"3\" x1=\"12\"\u003e\u003c\/line\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch4 style=\"margin: 0 0 6px 0; font-size: 15px; font-weight: 600; color: #111; font-family: inherit;\"\u003eFlagship Relay Volume Control\u003c\/h4\u003e\n\u003cp style=\"margin: 0; font-size: 12.5px; color: #666; line-height: 1.5; font-family: inherit;\"\u003eAdvanced electronic relay step attenuator guarantees perfect left-right channel matching, even at whisper-quiet levels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Card 3 --\u003e\n\u003cdiv style=\"flex: 1 1 calc(50% - 10px); min-width: 280px; box-sizing: border-box; background-color: #fff; padding: 20px; border-radius: 8px; border: 1px solid #eaeaea;\"\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 15px;\"\u003e\n\u003cdiv style=\"width: 36px; height: 36px; flex-shrink: 0; background-color: #111; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-bottom: 20px;\"\u003e\u003csvg stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.5\" stroke=\"#b89775\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"18\" width=\"18\"\u003e\u003crect rx=\"2\" height=\"14\" width=\"20\" y=\"5\" x=\"2\"\u003e\u003c\/rect\u003e\u003cpath d=\"M6 15l4-4 4 4 6-6\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch4 style=\"margin: 0 0 6px 0; font-size: 15px; font-weight: 600; color: #111; font-family: inherit;\"\u003ePremium GaN Power Supply\u003c\/h4\u003e\n\u003cp style=\"margin: 0; font-size: 12.5px; color: #666; line-height: 1.5; font-family: inherit;\"\u003eBuilt-in custom low-noise Gallium Nitride (GaN) supply block isolates electrical noise for a clean, black background.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Card 4 --\u003e\n\u003cdiv style=\"flex: 1 1 calc(50% - 10px); min-width: 280px; box-sizing: border-box; background-color: #fff; padding: 20px; border-radius: 8px; border: 1px solid #eaeaea;\"\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 15px;\"\u003e\n\u003cdiv style=\"width: 36px; height: 36px; flex-shrink: 0; background-color: #111; border-radius: 50%; display: flex; align-items: center; justify-content: center;\"\u003e\u003csvg stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.5\" stroke=\"#b89775\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"18\" width=\"18\"\u003e\u003cpath d=\"M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch4 style=\"margin: 0 0 6px 0; font-size: 15px; font-weight: 600; color: #111; font-family: inherit;\"\u003eGrounding Control Switch\u003c\/h4\u003e\n\u003cp style=\"margin: 0; font-size: 12.5px; color: #666; line-height: 1.5; font-family: inherit;\"\u003eRear toggle switch lets you choose between Grounded and Floating to instantly solve ground loop noise from your PC.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 3. Core Text Copy Block (SEO Optimized) --\u003e\n\u003cdiv style=\"margin-bottom: 35px;\"\u003e\n\u003ch3 style=\"font-size: 18px; font-weight: 600; color: #111; border-bottom: 1px solid #eee; padding-bottom: 8px; margin-bottom: 12px; font-family: inherit;\"\u003ePatented PLFC+ Balanced Amplification with 14x OPA1612A Op-Amps\u003c\/h3\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 15px; color: #444; font-family: inherit;\"\u003eThe core architecture of the \u003cstrong\u003eSMSL H400 MK2 fully balanced headphone amplifier\u003c\/strong\u003e utilizes a fully balanced 4-channel patented headset amplifier circuit, PLFC+. Working in flawless harmony with an array of 14 high-end OPA1612A operational amplifiers, this flagship device achieves a breathtakingly low distortion rate (THD+N) of just 0.00006% and an outstanding signal-to-noise ratio of 132dB. High-precision, low-temperature drift resistors ensure stable, uncolored thermal performance over long listening sessions, bringing the nuances of high-resolution audio recordings directly to your ears with absolute fidelity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 35px;\"\u003e\n\u003ch3 style=\"font-size: 18px; font-weight: 600; color: #111; border-bottom: 1px solid #eee; padding-bottom: 8px; margin-bottom: 12px; font-family: inherit;\"\u003eColossal Power Output \u0026amp; Specialized Low-Gain IEM Tuning\u003c\/h3\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 15px; color: #444; font-family: inherit;\"\u003eAs a robust \u003cstrong\u003eflagship headphone amplifier\u003c\/strong\u003e, the SMSL H400 MK2 provides unmatched headroom to power demanding full-sized planar magnetic and dynamic headphones, driving up to a monumental 18W at 16 ohms and 9W at 32 ohms over balanced connections. Simultaneously, sensitive in-ear monitors (IEMs) benefit from the low-gain setting (-11.5dB unbalanced \/ -5.5dB balanced), specifically tuned to suppress background noise. Backed by an electronic relay volume control system, it completely eliminates analog channel imbalance, offering solid, stable stereo imaging even at whisper-quiet listening volumes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 35px;\"\u003e\n\u003ch3 style=\"font-size: 18px; font-weight: 600; color: #111; border-bottom: 1px solid #eee; padding-bottom: 8px; margin-top: 40px; margin-bottom: 12px; font-family: inherit;\"\u003eReference Balanced Pre-amplifier with Grounding Control\u003c\/h3\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 15px; color: #444; font-family: inherit;\"\u003eThe SMSL H400 MK2 easily transitions from an individual head-amp to a high-end \u003cstrong\u003ebalanced analog pre-amplifier\u003c\/strong\u003e. Featuring both balanced XLR and unbalanced RCA pre-outputs on the rear panel, it integrates with active studio monitors and external power amplifiers. Using the full-function RC-8D remote control, you can comfortably switch inputs and adjust volume levels from a distance. The rear-panel Grounding control switch (Floating\/Grounded) allows you to break ground loops instantly when connected to computers or active monitors, while the internal high-quality muting relay system safeguards your downstream audio equipment by eliminating physical turn-on and turn-off pop sounds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 4. What's in the Box Card (Updated to Elegant Full-Width Design) --\u003e\n\u003ch3 style=\"font-size: 18px; font-weight: 600; color: #111; border-bottom: 1px solid #eee; padding-bottom: 8px; margin-top: 40px; margin-bottom: 20px; text-transform: uppercase; letter-spacing: 0.5px; font-family: inherit;\"\u003eIn the Box\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fafafa; border: 1px solid #eaeaea; border-radius: 4px; padding: 24px; margin-bottom: 40px;\"\u003e\n\u003cp style=\"margin: 0 0 15px 0; font-size: 13.5px; color: #555; line-height: 1.6; font-family: inherit;\"\u003eEvery SMSL H400 MK2 package includes the following essential components to ensure an immediate, high-fidelity connection to your audio system:\u003c\/p\u003e\n\u003cul style=\"margin: 0; padding-left: 20px; font-size: 13.5px; color: #111; line-height: 2; font-family: inherit;\"\u003e\n\u003cli\u003e\u003cstrong\u003eSMSL H400 MK2\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eFull-Function Remote Control (RC-8D)\u003c\/li\u003e\n\u003cli\u003eAC Power Supply Cord (Matched to destination country)\u003c\/li\u003e\n\u003cli\u003eUser Manual \/ Instruction Guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- 5. Accordion FAQs Section (Zero-JS Native Details summary with Toggles) --\u003e\n\u003ch3 style=\"font-size: 18px; font-weight: 600; color: #111; border-bottom: 1px solid #eee; padding-bottom: 8px; margin-top: 40px; margin-bottom: 20px; text-transform: uppercase; letter-spacing: 0.5px; font-family: inherit;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv style=\"margin-bottom: 40px;\"\u003e\n\u003cdetails style=\"border-bottom: 1px solid #eaeaea; padding: 15px 0; cursor: pointer;\" open=\"\"\u003e \u003csummary style=\"font-size: 14.5px; font-weight: 600; color: #111; list-style: none; display: flex; justify-content: space-between; align-items: center; font-family: inherit;\"\u003eCan the SMSL H400 MK2 be used as a standalone pre-amplifier? \u003cspan class=\"accordion-icon\" style=\"color: #b89775; font-size: 16px; font-weight: bold; margin-left: 10px;\"\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cp style=\"margin: 10px 0 0 0; font-size: 13.5px; color: #555; line-height: 1.6; padding-right: 20px; font-family: inherit;\"\u003eYes, the H400 MK2 functions as a high-fidelity analog pre-amplifier. It features XLR balanced and RCA unbalanced pre-outputs on the rear panel, allowing direct connection to active studio monitors or power amplifiers. You can easily toggle between headphone output and pre-out modes via the front panel, the remote control's FN button, or the menu.\u003c\/p\u003e\n\u003c\/details\u003e \u003cdetails style=\"border-bottom: 1px solid #eaeaea; padding: 15px 0; cursor: pointer;\" open=\"\"\u003e \u003csummary style=\"font-size: 14.5px; font-weight: 600; color: #111; list-style: none; display: flex; justify-content: space-between; align-items: center; font-family: inherit;\"\u003eWhat does the Grounding Control (Floating\/Grounded) switch do? \u003cspan class=\"accordion-icon\" style=\"color: #b89775; font-size: 16px; font-weight: bold; margin-left: 10px;\"\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cp style=\"margin: 10px 0 0 0; font-size: 13.5px; color: #555; line-height: 1.6; padding-right: 20px; font-family: inherit;\"\u003eWhen connecting a USB DAC to a PC and then outputting to an amplifier, ground loop noise (hum or static) can often occur. The Grounding control switch on the rear panel of the H400 MK2 allows you to switch between \"Grounded\" and \"Floating\" to break the ground loop electrically and achieve a completely quiet, silent background.\u003c\/p\u003e\n\u003c\/details\u003e \u003cdetails style=\"border-bottom: 1px solid #eaeaea; padding: 15px 0; cursor: pointer;\" open=\"\"\u003e \u003csummary style=\"font-size: 14.5px; font-weight: 600; color: #111; list-style: none; display: flex; justify-content: space-between; align-items: center; font-family: inherit;\"\u003eWill sensitive in-ear monitors (IEMs) experience background noise or hiss? \u003cspan class=\"accordion-icon\" style=\"color: #b89775; font-size: 16px; font-weight: bold; margin-left: 10px;\"\u003e\u003c\/span\u003e\u003c\/summary\u003e\n\u003cp style=\"margin: 10px 0 0 0; font-size: 13.5px; color: #555; line-height: 1.6; padding-right: 20px; font-family: inherit;\"\u003eNo. The SMSL H400 MK2 features a highly optimized low-gain setting (-11.5dB on single-ended \/ -5.5dB on balanced outputs) specifically designed for highly sensitive IEMs. This attenuates the noise floor, ensuring a completely quiet, hiss-free background.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c!-- 6. Technical Specifications Table --\u003e\n\u003ch3 style=\"font-size: 18px; font-weight: 600; color: #111; border-bottom: 1px solid #eee; padding-bottom: 8px; margin-top: 40px; margin-bottom: 15px; text-transform: uppercase; letter-spacing: 0.5px; font-family: inherit;\"\u003eSMSL H400 MK2 Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 13.5px; color: #333; text-align: left; background-color: #fafafa; border: 1px solid #eee; margin-bottom: 30px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f1f1f1; border-bottom: 1px solid #ddd;\"\u003e\n\u003cth style=\"padding: 12px; font-weight: 600; width: 35%; font-family: inherit;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"padding: 12px; font-weight: 600; font-family: inherit;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 500; background-color: #fff; font-family: inherit;\"\u003eInputs\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; background-color: #fff; font-family: inherit;\"\u003eBalanced (XLR), Unbalanced (RCA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 500; font-family: inherit;\"\u003eHeadphone Outputs\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; font-family: inherit;\"\u003e4.4mm Balanced, XLR Balanced, 6.35mm Unbalanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 500; background-color: #fff; font-family: inherit;\"\u003ePre-outputs\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; background-color: #fff; font-family: inherit;\"\u003eXLR Balanced, RCA Unbalanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 500; vertical-align: top; font-family: inherit;\"\u003eOutput Power (Balanced)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; font-family: inherit;\"\u003e16Ω: 18W\u003cbr\u003e32Ω: 9W\u003cbr\u003e300Ω: 1100mW\u003cbr\u003e600Ω: 550mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 500; vertical-align: top; background-color: #fff; font-family: inherit;\"\u003eOutput Power (Unbalanced)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; background-color: #fff; font-family: inherit;\"\u003e16Ω: 5W\u003cbr\u003e32Ω: 2.5W\u003cbr\u003e300Ω: 260mW\u003cbr\u003e600Ω: 130mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 500; font-family: inherit;\"\u003eSNR \u0026amp; Dynamic Range\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; font-family: inherit;\"\u003e132dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 500; background-color: #fff; font-family: inherit;\"\u003eTHD+N\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; background-color: #fff; font-family: inherit;\"\u003e-123dB, 0.00006% (1kHz, 32 Ω)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 500; font-family: inherit;\"\u003eInput Impedance\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; font-family: inherit;\"\u003e47kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 500; background-color: #fff; font-family: inherit;\"\u003eHeadphone Amp Output Impedance\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; background-color: #fff; font-family: inherit;\"\u003eNear 0 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 500; font-family: inherit;\"\u003ePre-output Impedance\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; font-family: inherit;\"\u003eBalanced: 44Ω | Unbalanced: 22Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 500; background-color: #fff; font-family: inherit;\"\u003eFrequency Response\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; background-color: #fff; font-family: inherit;\"\u003e20Hz - 100kHz (-0.5dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 500; vertical-align: top; font-family: inherit;\"\u003eGain Settings\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; font-family: inherit;\"\u003eBalanced: Low (-5.5dB), Middle (6dB), High (19.6dB)\u003cbr\u003eUnbalanced: Low (-11.5dB), Middle (0dB), High (13.6dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 500; background-color: #fff; font-family: inherit;\"\u003ePower Consumption\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; background-color: #fff; font-family: inherit;\"\u003e\u0026lt;100W (EN60065)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px; font-weight: 500; font-family: inherit;\"\u003eDimensions \u0026amp; Weight\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; font-family: inherit;\"\u003e254 x 48 x 189 mm (WxHxD) | 2.2kg (4.85lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- 7. Section Header for Lineup Comparison --\u003e\n\u003cdiv style=\"text-align: center; margin-top: 50px; margin-bottom: 45px;\"\u003e\n\u003cspan style=\"font-size: 11px; font-weight: bold; color: #b89775; letter-spacing: 2px; text-transform: uppercase; display: block; margin-bottom: 10px;\"\u003eProduct Lineage Masterclass\u003c\/span\u003e\n\u003ch2 style=\"font-size: 26px; font-weight: 500; color: #111; letter-spacing: 0.5px; margin: 0 0 12px 0;\"\u003eSMSL Balanced Amplifier Lineup Matrix\u003c\/h2\u003e\n\u003cp style=\"font-size: 14.5px; color: #666; max-width: 650px; margin: 0 auto;\"\u003eWith the legacy H300 and original H400 retired, the newly launched flagship \u003cstrong\u003eSMSL H400 MK2\u003c\/strong\u003e stands as our active ultimate powerhouse—combining monumental balanced power, advanced GaN power delivery, and surgical ground loop isolation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 8. Re-designed Premium 3-Point Highlights Grid (Minimalist SVG Icons) --\u003e\n\u003ch3 style=\"font-size: 18px; font-weight: 600; color: #111; border-bottom: 1px solid #eee; padding-bottom: 8px; margin-top: 40px; margin-bottom: 25px; text-transform: uppercase; letter-spacing: 0.5px; font-family: inherit;\"\u003eWhy the Flagship H400 MK2 Leads the Lineup\u003c\/h3\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 15px; justify-content: space-between; margin-bottom: 40px;\"\u003e\n\u003c!-- Card 1 (Power SVG) --\u003e\n\u003cdiv style=\"flex: 1 1 calc(33.33% - 10px); min-width: 240px; box-sizing: border-box; background-color: #fff; padding: 24px; border-radius: 8px; border: 1px solid #eaeaea;\"\u003e\n\u003cdiv style=\"width: 44px; height: 44px; background-color: #111111; border: 1px solid #b89775; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-bottom: 20px;\"\u003e\u003csvg stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.5\" stroke=\"#b89775\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"22\" width=\"22\"\u003e \u003cpath d=\"M13 2L3 14h9l-1 8 10-12h-9l1-8z\"\u003e\u003c\/path\u003e \u003c\/svg\u003e\u003c\/div\u003e\n\u003ch4 style=\"margin: 0 0 8px 0; font-size: 14px; font-weight: 600; color: #111; font-family: inherit;\"\u003eMonumental 18W Output\u003c\/h4\u003e\n\u003cp style=\"margin: 0; font-size: 12.5px; color: #666; line-height: 1.6; font-family: inherit;\"\u003eDelivers a colossal 18W RMS @ 16Ω (and 9W @ 32Ω) of balanced drive, far outperforming the mid-tier H200 or original H400.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Card 2 (Isolation SVG) --\u003e\n\u003cdiv style=\"flex: 1 1 calc(33.33% - 10px); min-width: 240px; box-sizing: border-box; background-color: #fff; padding: 24px; border-radius: 8px; border: 1px solid #eaeaea;\"\u003e\n\u003cdiv style=\"width: 44px; height: 44px; background-color: #111111; border: 1px solid #b89775; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-bottom: 20px;\"\u003e\u003csvg stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.5\" stroke=\"#b89775\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"22\" width=\"22\"\u003e \u003cpath d=\"M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z\"\u003e\u003c\/path\u003e \u003c\/svg\u003e\u003c\/div\u003e\n\u003ch4 style=\"margin: 0 0 8px 0; font-size: 14px; font-weight: 600; color: #111; font-family: inherit;\"\u003eGround Loop Isolation\u003c\/h4\u003e\n\u003cp style=\"margin: 0; font-size: 12.5px; color: #666; line-height: 1.6; font-family: inherit;\"\u003eIncorporates a professional rear-panel Grounding switch (Floating\/Grounded) to isolate USB\/PC ground loops and eliminate static.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Card 3 (GaN Power Supply SVG) --\u003e\n\u003cdiv style=\"flex: 1 1 calc(33.33% - 10px); min-width: 240px; box-sizing: border-box; background-color: #fff; padding: 24px; border-radius: 8px; border: 1px solid #eaeaea;\"\u003e\n\u003cdiv style=\"width: 44px; height: 44px; background-color: #111111; border: 1px solid #b89775; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin-bottom: 20px;\"\u003e\u003csvg stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"1.5\" stroke=\"#b89775\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"22\" width=\"22\"\u003e \u003crect rx=\"2\" height=\"18\" width=\"18\" y=\"3\" x=\"3\"\u003e\u003c\/rect\u003e \u003crect rx=\"1\" height=\"10\" width=\"10\" y=\"7\" x=\"7\"\u003e\u003c\/rect\u003e \u003c\/svg\u003e\u003c\/div\u003e\n\u003ch4 style=\"margin: 0 0 8px 0; font-size: 14px; font-weight: 600; color: #111; font-family: inherit;\"\u003eBespoke GaN Power\u003c\/h4\u003e\n\u003cp style=\"margin: 0; font-size: 12.5px; color: #666; line-height: 1.6; margin-bottom: 0;\"\u003eEquipped with a highly custom, low-noise Gallium Nitride (GaN) power supply, offering unprecedented power density and black background.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 9. Head-to-Head Lineup Matrix Table --\u003e\n\u003ch3 style=\"font-size: 18px; font-weight: 600; color: #111; border-bottom: 1px solid #eee; padding-bottom: 8px; margin-top: 40px; margin-bottom: 25px; text-transform: uppercase; letter-spacing: 0.5px; font-family: inherit;\"\u003eSMSL Balanced Amplifier Lineup Matrix\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; border: 1px solid #eaeaea; border-radius: 8px;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 13px; text-align: left; color: #333;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #111; color: #fff; border-bottom: 2px solid #b89775;\"\u003e\n\u003cth style=\"padding: 14px 16px; font-weight: 600;\"\u003eSpec \/ Feature\u003c\/th\u003e\n\u003cth style=\"padding: 14px 16px; font-weight: 600; color: #b89775; background-color: #1a1a1a;\"\u003eSMSL H400 MK2 (Active Flagship)\u003c\/th\u003e\n\u003cth style=\"padding: 14px 16px; font-weight: 600; color: #aaa;\"\u003eSMSL H200 (Active Mid-tier)\u003c\/th\u003e\n\u003cth style=\"padding: 14px 16px; font-weight: 600; color: #aaa;\"\u003eSMSL H400 (Retired Legacy)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003c!-- Row 1 --\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 500; background-color: #fff;\"\u003eRetail Price\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 600; color: #111; background-color: #fffaf4;\"\u003e$549 (Active)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e$399 (Active)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e$510 (Retired)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c!-- Row 2 --\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 500; background-color: #fafafa;\"\u003eProduction Status\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 600; color: #b89775; background-color: #fffdf8;\"\u003eActive Flagship\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #888;\"\u003eActive \u0026amp; Supported\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #888;\"\u003eDiscontinued\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c!-- Row 3 --\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 500; background-color: #fff;\"\u003eVolume Architecture\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 600; color: #111; background-color: #fffaf4;\"\u003ePrecision Relays\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003ePrecision Relays\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003ePrecision Relays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c!-- Row 4 --\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 500; background-color: #fafafa;\"\u003eUser Interface\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555; background-color: #fffdf8;\"\u003eColor IPS Screen\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003eColor IPS Screen\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003eColor IPS Screen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c!-- Row 5 --\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 500; background-color: #fff;\"\u003eGrounding Control Switch\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 600; color: #111; background-color: #fffaf4;\"\u003eYes (Floating \/ Grounded)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003eNo\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c!-- Row 6 --\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 500; background-color: #fafafa;\"\u003eBalanced Power (16Ω)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555; background-color: #fffdf8;\"\u003e18.0W + 18.0W RMS\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e4.0W + 4.0W RMS\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e15.0W + 15.0W RMS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c!-- Row 7 --\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 500; background-color: #fff;\"\u003eBalanced Power (32Ω)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555; background-color: #fffaf4;\"\u003e9.0W + 9.0W RMS\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e5.0W + 5.0W RMS\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e7.5W + 7.5W RMS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c!-- Row 8 --\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 500; background-color: #fafafa;\"\u003eBalanced Power (300Ω)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555; background-color: #fffdf8;\"\u003e1100mW + 1100mW RMS\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e1000mW + 1000mW RMS\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e1000mW + 1000mW RMS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c!-- Row 9 --\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 500; background-color: #fff;\"\u003eSNR \/ Dynamic Range\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555; background-color: #fffaf4;\"\u003e132dB\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e131dB\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e133dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c!-- Row 10 --\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 500; background-color: #fafafa;\"\u003eTHD+N\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555; background-color: #fffdf8;\"\u003e0.00006% (-123dB)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e0.00007% (-122dB)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e0.00006% (-123dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c!-- Row 11 --\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 500; background-color: #fff;\"\u003eGain Steps (Balanced)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555; background-color: #fffaf4;\"\u003eLow (-5.5dB) \/ Mid (6dB) \/ High (19.6dB)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003eLow (-3.5dB) \/ Mid (6dB) \/ High (19.7dB)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003eLow (-5.8dB) \/ Mid (6dB) \/ High (20.4dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c!-- Row 12 --\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 500; background-color: #fafafa;\"\u003ePre-outputs (Rear)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555; background-color: #fffdf8;\"\u003eXLR Balanced \/ RCA Unbalanced\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003eXLR Balanced \/ RCA Unbalanced\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003eXLR Balanced \/ RCA Unbalanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c!-- Row 13 --\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 500; background-color: #fff;\"\u003eWidth (Chassis size)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 600; color: #b89775; background-color: #fffaf4;\"\u003e254mm (Full Size)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e200mm (Ultra-Compact)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e254mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c!-- Row 14 --\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 500; background-color: #fafafa;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555; background-color: #fffdf8;\"\u003e2.20 kg \/ 4.85 lbs\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e1.20 kg \/ 2.65 lbs\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e2.03 kg \/ 4.47 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c!-- Row 15 --\u003e\n\u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n\u003ctd style=\"padding: 12px 16px; font-weight: 500; background-color: #fff;\"\u003ePower Consumption\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555; background-color: #fffaf4;\"\u003e\u0026lt;100W (EN60065)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e\u0026lt;60W (EN60065)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 16px; color: #555;\"\u003e\u0026lt;50W (EN60065)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 10. Original Images with SEO-friendly Descriptive Alt Tags (H400 MK2 Edition) --\u003e\n\u003cdiv style=\"text-align: center; margin-top: 40px;\"\u003e\n\u003cp\u003e\u003cimg style=\"max-width: 100%; height: auto; display: block; margin: 0 auto 15px;\" alt=\"SMSL H400 MK2 fully balanced desktop headphone amplifier front panel with volume knob\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0130\/6591\/2420\/files\/XQ3H400MK241.jpg?v=1787301584\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"max-width: 100%; height: auto; display: block; margin: 0 auto 15px;\" alt=\"SMSL H400 MK2 audiophile desktop DAC and amplifier stack design for home audio\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0130\/6591\/2420\/files\/XQ3H400MK242.jpg?v=1787301585\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"max-width: 100%; height: auto; display: block; margin: 0 auto 15px;\" alt=\"SMSL H400 MK2 rear panel interface with balanced XLR inputs and RCA preamp outputs\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0130\/6591\/2420\/files\/XQ3H400MK243.jpg?v=1787301584\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"max-width: 100%; height: auto; display: inline-block; margin: 0 10px 15px;\" alt=\"SMSL H400 MK2 high-power headphone amp silver aluminum chassis perspective view\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0130\/6591\/2420\/files\/XQ3H400MK244.jpg?v=1787301580\"\u003e \u003cimg style=\"max-width: 100%; height: auto; display: inline-block; margin: 0 10px 15px;\" alt=\"SMSL H400 MK2 compact pre-amplifier and balanced headphone amp internal circuit layout\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0130\/6591\/2420\/files\/XQ3H400MK245.jpg?v=1787301581\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"SMSL","offers":[{"title":"Black","offer_id":49229441270004,"sku":null,"price":539.0,"currency_code":"USD","in_stock":true},{"title":"Silver","offer_id":49229441302772,"sku":null,"price":539.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0130\/6591\/2420\/files\/G1_3b772dc4-29a1-4783-b182-3e7d0e1bf371.jpg?v=1787301730","url":"https:\/\/www.hifi-express.com\/de\/products\/smsl-h400mk2","provider":"Hifi-express","version":"1.0","type":"link"}